British Thermal Unit (BTU)
The british thermal unit is a unit of energy, used for air conditioner and furnace ratings, natural gas billing in the US. Its symbol is BTU.
BTU
kcal
1 british thermal unit equals
| Kilocalories | 0.252164 kcal |
| Kilowatt-hours | 0.000293071 kWh |
| Joules | 1,055.06 J |
About the british thermal unit
The British Thermal Unit was standardized in the late 19th century as the heat needed to raise one pound of water by one degree Fahrenheit.
In everyday use the british thermal unit appears in air conditioner and furnace ratings, natural gas billing in the US. As a point of reference: a window air conditioner is typically rated 5000 to 12000 BTU per hour.